Silas l



' s. L. COVELL.

Bell Pun,

Patented July 16, 1867.

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\ Letters Patent No. 66,801, dated July 16, 1867.

IMPROVEMENT IN THE CONSTRUCTION OF BELL-PULLS AND TRIPS Be it known thatI,- SILZAS L. COVELL, of the city of Troy, county of Rensselaer, andState of New York, have invented a new and improved Mode of ConstructingBelhPulls and Trips, by means of whichgongs or bells are struck or rung;and I do hereby declare that the following is a full and exactdescription thereof, reference being had to the accompanying drawings,and to the letters of reference marked thereon.

The nature of my invention consists in constructing the trip, by whichthe hammer of the hell or gong is drawn back and then allowed suddenlyto become'disengaged and thrown against the hell or gong at or near thepull, instead of at or'near the hell or gong as ordinarily constructed.

For the purpose of enabling others skilled in the art to make and use myinvention, I will proceed to describe the construction and operation ofthe same, reference being had to the accompanying drawings and theletters of reference marked thereou,-which make a part of thisspecification.

I put the arm A of the bell-knob through the jamb or casings of thedoor, or through the floor of the pilothouse of vessels in the usualmanner, and then connect this arm with the trip B, which is constructedin or behind the jamb or casings of the door, or above or in or belowthe floor of the pilot-house of vessels, and as near to the bell-knob aspracticable. This trip B works in the catch D, to which the bell-wire isattached. The trip B and the catch D are placed at such points that whenthe arm of the bell-knob is drawn out to a certain point, say the pointE, the trip B slips ofi from the catch D, and the catch thus becomingsuddenly disengaged from the power or resistance, the hammer of the gongor hell, which is connected by wire and elbows to the catch D in theusual manner, is suddenly thrown back against the gong or hell by therecoil of the catch and Wire, aided by the usual spring at the hammer ofthe gong or hell. Thetrip is carried backto its proper place by thespring 0 working against it, which carries it over andbehind the catchD. Or it may be constructed as follows, (see fig. 2:) On the end of thearm, which is part of the belhknob and passes the casings, &c., I make aslot and insert therein the trip held by a pin. I make the fulcrum ofthetrip so far above the centre that the trip will readily fallback to itsproper place as soon as it is disengaged from the catch. The arm A isdrawn back to its placeby'a spiral spring, G, attached to the arm A andto some stationary point at the proper place. After the trip B passesthe catch D and becomes disengaged, the spring draws back the arm andthe trip 13 sinks into the slot cut in the end of the arm as the trippasses back over the catch D, and then readily drops to its properplace.

The principal reason for the failure of gongs and bells to ring when thehell-pull is drawn, as new constructed, is that the trip is so far fromthe bell-pull (being a. the gong or hell) that with the usual slack ofthe wire from'the pull to the-trip, the trip is not disengaged. from thecatch so as to allow the hammer to strike the gong or bell. Engineers onsteamers frequently commit errors by reason of the failure of the gongor hell to ring when the pull is drawn by the pilot or other properoflicer, resulting in great damage to vessels, and sometimes in loss oflife.

What I claim as my invention, and desire to secure by Letters Patent, is

The combination of the arm A with the trip B,spring C, and catch D.constructed and operating substantially in the manner and for thepurpose herein described SILAS L. CQVELL.

Witnesses:

0. E. DAVENPORT, N. DAVENPORT

